Phil McKerracher

Brilliant, thanks.

Sure, here it is...

(Some of us descended from warders, which is worse!) Action set to "Delete matching messages" where criteria are "Messages older than 30 days", see attached.

It's in Maildir format. I've deleted it now but I do have backups. They contain potentially confidential messages but I might be able to get permission from the customer to release them if it would help. And anyway you're Australian and therefore trustworthy, right? :-)

I'm not sure and I can't check it now, but I think I remember seeing auto.pl in "top" (but I was concentrating on CPU activity at the time). Similarly with trash folder size - it was large, several GB, maybe 10, I think.

Email autoclearing uses all available memory, crashes server

No, at least nothing relevant as far as I could tell. The messages were sent successfully, just without their DKIM signature. It should be pretty easy to reproduce.

It's not a question, it's a bug report. It's not related to DNS at all as far as I can tell.